Spring supporting structure of eo reactor

Abstract

The utility model relates to the technical field of chemical reactors, provides a spring supporting structure of an eo reactor, and solves the problem that the running performance of equipment and the service life of a catalyst are influenced due to design defects of the existing equipment. The reactor comprises a reaction tube, the reaction tube is filled with a catalyst, a first spring and a supporting piece are arranged in the reaction tube, the first spring is arranged at the bottom of the reaction tube, the supporting piece is arranged at the top of the reaction tube, and the first spring comprises a first straight ring section, a first conical ring section and a second straight ring section which are sequentially connected from top to bottom. The diameter of the second straight ring section is larger than that of the first straight ring section; the accurate design and manufacture of the first spring can ensure the stability of the catalyst bed layer and the uniformity of fluid distribution, so that the dust removal is facilitated, and the risk of tail combustion after the catalyst dust is accumulated at the bottom of the bed layer is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of chemical reactor technology, specifically to a spring support structure for an eo reactor. Background Technology

[0002] The YS-9010 catalyst, developed by the Beijing Research Institute of Chemical Industry, will break the industrial production capacity record for the largest EO / EG unit previously put into operation. Traditional EO / EG unit reactors use an inert ball support system at the bottom of the tubes, such as the tubular fixed-bed reactor for ethylene oxide production disclosed in Chinese Patent Publication No. CN2764474Y. The reactor includes a reactor shell, a reactant gas inlet, a reactant gas outlet, a liquid inlet, a liquid outlet, and reaction tubes with tube sheets at both ends. In the ethylene oxide preparation process, the reaction tubes are filled with catalyst, and the tube diameter is 40-50 mm. This type of support system can cause dust accumulation at the bottom of the catalyst, creating a risk of tail-burning and affecting the operating performance and catalyst life of the EO / EG unit. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model provides a spring support structure for an eo reactor, which solves the problem that the existing equipment's operating performance and catalyst life are affected by design defects.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A spring-supported structure for an EO reactor includes a reaction tube filled with a catalyst. The reaction tube is provided with a first spring and a support member. The first spring is located at the bottom of the reaction tube, and the support member is located at the top of the reaction tube. The first spring includes a first straight coil section, a first conical coil section, and a second straight coil section connected sequentially from top to bottom. The diameter of the second straight coil section is larger than that of the first straight coil section.

[0006] Furthermore, the effective number of loops ratio of the first straight loop segment, the first conical loop segment, and the second straight loop segment is 1:1:2.

[0007] Furthermore, the effective number of revolutions for the first straight loop segment, the first cone loop segment, and the second straight loop segment are 3, 3, and 6, respectively.

[0008] Furthermore, the diameter of the first straight section is 18-22 mm.

[0009] Furthermore, the diameter of the second straight section is 38-43 mm.

[0010] Furthermore, the nominal pitch of the first straight coil segment, the first conical coil segment, and the second straight coil segment is the same.

[0011] Furthermore, the nominal pitch of the first straight coil segment, the first conical coil segment, and the second straight coil segment is 4.8-5.6 mm.

[0012] Furthermore, the first spring is made of 304 stainless steel, and the wire diameter is 3-5mm.

[0013] Furthermore, the support member includes a second spring, which includes a third straight coil segment and a second conical coil segment connected sequentially from top to bottom.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The first spring features high strength, high toughness, and corrosion resistance, enabling it to better adapt to the harsh environment of the EO production process. Simultaneously, the precise design and manufacturing of the first spring ensures the stability of the catalyst bed and the uniformity of fluid distribution, facilitating dust removal and effectively reducing the risk of catalyst dust accumulation at the bottom of the bed leading to tail-end combustion. After modification, the reactor pressure drop can be reduced by 5%, approximately 8 kPaG, and the residence time is shortened, thereby improving catalyst selectivity, reducing side reactions, and increasing yield.

[0016] 2. Effectively reduces turbine compressor power and saves ultra-high pressure steam (estimated at 8 tons per hour under the same load).

[0017] 3. Improve loading and unloading efficiency, reduce the construction time of spring loading and unloading and bottom inert ball filling by 3 days, effectively reduce loading and unloading difficulty, and save loading and unloading time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the first spring structure according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the top structure of the first spring in an embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the bottom structure of the first spring in an embodiment of this utility model.

[0022] Explanation of icon numbers

[0023] Reaction tube 1;

[0024] Catalyst 2;

[0025] First spring 3; First straight coil segment 31; First conical coil segment 32; Second straight coil segment 33;

[0026] Support component 4; third straight section 41; second conical section 42. Detailed Implementation

[0027] The following will describe the implementation of this utility model in detail with reference to specific embodiments, so that the process of how this utility model uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0028] Example

[0029] like Figures 1 to 4 As shown, a spring-supported structure for an EO reactor includes a reaction tube 1 filled with a catalyst 2. The reaction tube 1 is provided with a first spring 3 and a support member 4. The first spring 3 is located at the bottom of the reaction tube 1, and the support member 4 is located at the top of the reaction tube 1. The first spring 3 includes a first straight coil section 31, a first conical coil section 32, and a second straight coil section 33 connected sequentially from top to bottom. The diameter of the second straight coil section 33 is larger than that of the first straight coil section 31.

[0030] The first spring 3 features high strength, high toughness, and corrosion resistance, enabling it to better adapt to the harsh environment of the EO production process. Simultaneously, the precise design and manufacturing of the first spring 31 ensures the stability of the catalyst bed and the uniformity of fluid distribution, facilitating dust removal and effectively reducing the risk of tail-end combustion due to catalyst dust accumulation at the bottom of the bed. After the modification, the reactor pressure drop can be reduced by 5%, approximately 8 kPaG, and the residence time can be shortened, thereby improving catalyst selectivity, reducing side reactions, and increasing yield; effectively reducing turbine compressor power and saving ultra-high pressure steam (estimated at 8 tons per hour under the same load); improving loading and unloading efficiency, reducing the construction time of spring loading and unloading and bottom inert ball filling by 3 days, effectively reducing loading and unloading difficulty and saving time.

[0031] The effective number ratio of the first straight coil segment 31, the first conical coil segment 32, and the second straight coil segment 33 is 1:1:2. In this embodiment, the effective number of turns of the first straight coil segment 31, the first conical coil segment 32, and the second straight coil segment 33 are 3, 3, and 6 turns, respectively. In other preferred embodiments, the effective number of turns of each segment can be adjusted according to the different specifications of the tube 1, which will not be elaborated here.

[0032] In this embodiment, the diameter of the first straight section 31 is 20.7 mm.

[0033] In this embodiment, the diameter of the second straight section 33 is 41.7 mm.

[0034] The nominal pitch of the first straight coil segment 31, the first conical coil segment 32, and the second straight coil segment 33 is the same.

[0035] In this embodiment, the nominal pitch of the first straight coil section 31, the first conical coil section 3, and the second straight coil section 33 is 4.8-5.6mm. The spring pitch can fluctuate within 10% above or below the nominal pitch without affecting its normal use. This application does not specifically limit the specific nominal pitch and adjusts it according to the actual situation.

[0036] The first spring 3 is made of 304 stainless steel and the wire diameter is 4mm.

[0037] In this embodiment, the support member 4 includes a second spring, which includes a third straight coil section 41 and a second conical coil section 42 connected sequentially from top to bottom, and the effective coil ratio of the third straight coil section 41 to the second conical coil section 42 is 6:5.

[0038] In other preferred embodiments, the support member 4 can be in the form of a conical spring and several inert balls as in the traditional solution, which is an existing structural form and will not be described in detail here.

[0039] The reaction tube 1 is a YS series catalyst EO reactor tube.

[0040] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A spring-supported structure for an eo reactor, comprising a reaction tube filled with a catalyst, characterized in that: The reaction tube is provided with a first spring and a support member. The first spring is located at the bottom of the reaction tube, and the support member is located at the top of the reaction tube. The first spring includes a first straight coil section, a first conical coil section and a second straight coil section connected from top to bottom. The diameter of the second straight coil section is larger than that of the first straight coil section.

2. The spring support structure of an eo reactor according to claim 1, characterized in that: The effective number of rotations of the first straight section, the first conical section, and the second straight section is 1:1:

2.

3. The spring support structure of an eo reactor according to claim 2, characterized in that: The effective number of revolutions for the first straight loop segment, the first conical loop segment, and the second straight loop segment are 3, 3, and 6, respectively.

4. The spring support structure of an eo reactor according to claim 1, characterized in that: The diameter of the first straight section is 18-22 mm.

5. The spring support structure of an eo reactor according to claim 1, characterized in that: The diameter of the second straight section is 38-43 mm.

6. The spring support structure of an eo reactor according to claim 1, characterized in that: The nominal pitch of the first straight coil segment, the first conical coil segment, and the second straight coil segment is the same.

7. The spring support structure of an eo reactor according to claim 6, characterized in that: The nominal pitch of the first straight coil segment, the first conical coil segment, and the second straight coil segment is 4.8-5.6 mm.

8. The spring support structure of an eo reactor according to claim 1, characterized in that: The first spring is made of 304 stainless steel, and the wire diameter is 3-5mm.

9. The spring support structure of an eo reactor according to claim 1, characterized in that: The support member includes a second spring, which includes a third straight coil section and a second conical coil section connected sequentially from top to bottom.

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